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TimezonePair
Home·Philadelphia·Philadelphia × Nukuʻalofa
Prime meridian·:: UTC·

Philadelphia×Nukuʻalofa

United States · US
Philadelphia
—:—
America/New_York·
DST active
Tonga · TO
Nukuʻalofa
—:—
Pacific/Tongatapu·
No DST

Philadelphia is 17 hours ahead of Nukuʻalofa. Scrub a time, meet in the overlap, ship the invite — before the kettle boils.

◊ at a glance

Three numbers. The ones that decide the meeting.

01
Difference
17h ahead
Philadelphia vs Nukuʻalofa
02
Overlap
1h
Business hours 09:00 – 17:00
03
UTC offsets
GMT-4 / GMT+13
EDT · Tongatapu
04
Flight
15h
12,328 km · great-circle, non-stop cruise
◊ the overlap

When the world meets at work.

24-hour overlap
1h shared · 16:00 – 17:00 Philadelphia
Philadelphia
—:—
0
3
6
9
12
15
18
21
Nukuʻalofa
—:—
18
21
0
3
6
9
12
15
Scrub a meeting time14:00 Philadelphia
Same moment in Nukuʻalofa07:00 Nukuʻalofa
◊ hour by hour

Read the day in both zones.

Share this meeting
timezonepair.com/from/philadelphia/to/nukuʻalofa?t=14&a=A&d=2026-04-27&dur=60
14:00 Philadelphia07:00 Nukuʻalofa
Full 24-hour reference
PhiladelphiaNukuʻalofa
00:00
17:00
01:00
18:00
02:00
19:00
03:00
20:00
04:00
21:00
05:00
22:00
06:00
23:00
07:00
00:00
08:00
01:00
09:00Philadelphia only
02:00
10:00Philadelphia only
03:00
11:00Philadelphia only
04:00
12:00Philadelphia only
05:00
13:00Philadelphia only
06:00
14:00Philadelphia only
07:00
15:00Philadelphia only
08:00
16:00Both working
09:00
17:00
10:00Nukuʻalofa only
18:00
11:00Nukuʻalofa only
19:00
12:00Nukuʻalofa only
20:00
13:00Nukuʻalofa only
21:00
14:00Nukuʻalofa only
22:00
15:00Nukuʻalofa only
23:00
16:00Nukuʻalofa only
◊ common questions

Quick answers. Before you book the call.

What's the time difference between Philadelphia and Nukuʻalofa?

Philadelphia is 17 hours ahead of Nukuʻalofa. Philadelphia runs on GMT-4 and Nukuʻalofa on GMT+13. The gap can shift by an hour when either side enters or leaves daylight saving — the live clocks above always reflect the current offset.

When's the best time to schedule a meeting?

There are 1 hour where both cities are inside a 09:00–17:00 workday. Aim for the middle of that window so neither side is starting or closing out.

Does daylight saving time change the difference?

Yes, if either city observes DST. When one side shifts and the other doesn't, the gap changes by one hour. The DST badges under each clock show whether each zone is currently shifted and when the next transition lands.

How far is Philadelphia from Nukuʻalofa?

About 12,328 km as the crow flies (great-circle distance). A non-stop commercial flight cruises that in roughly 15h, not counting airport time, winds, or routing around restricted airspace.

Can I send this meeting time as a calendar invite?

Yes. Pick a time on the slider above, open the meeting card, customize the title and duration, then download the .ics file. It imports cleanly into Google Calendar, Outlook, and Apple Calendar with the correct timezone attached.

◊ keep going

One pair down. 299 cities to go.

Every pair in 300 cities runs the same clocks, the same overlap, the same one-click invite. Pick another.

PHILADELPHIA · America/New_York
GMT-4 · 39.95°, -75.17°

NUKUʻALOFA · Pacific/Tongatapu
GMT+13 · -21.14°, -175.21°

1h shared · 17h ahead